【作者】 李晓辉；

【导师】 邬义杰；

【作者基本信息】 浙江大学 ， 机械制造及其自动化， 2007， 硕士

【摘要】 数控技术是现代制造业的灵魂核心，是制造自动化的关键基础，其发展程度是一个国家工业现代化水平的重要标志。加减速控制是数控的关键技术之一，对于实际的加工质量有着重要的影响。本论文以“高速微细数控加工系统”的项目课题为背景，在分析现有技术的基础上，就数控系统的加减速控制方法进行了深入、系统的研究。本文共分六章。第一章首先介绍了数控技术的发展历程和趋势，然后说明了加减速控制的重要意义和分类，阐述了柔性加减速控制的目标，对现阶段常用的加减速控制方法进行了简要的评述，最后指出了本论文研究的内容和意义。第二章首先介绍了常用的加减速方法并分析了其特点，最后详细阐述了提出并实现的五阶段S曲线柔性加减速控制方法，叙述了其基本原理和数学模型，并给出了具体的控制方法。第三章主要是关于高速加工中S曲线柔性加减速控制方法的研究，高速加工中相邻路径段以转接速度过渡，能够有效提高加工的效率，本论文给出了转接点速度的影响因素和求解方法，然后在此基础上扩展建立了五阶段S曲线柔性加减速的通用控制方法。第四章将加减速模块嵌入到数控系统软件中，对软件系统进行了开发实现，利用软件芯片的思想建立了软件系统结构模型，通过“资源分时共享”的多线程技术实现了实时多任务调度，并对软件系统的控制数据流程进行了说明。第五章首先对系统的功能和主要界面作了介绍，然后通过实验验证了五阶段S曲线柔性加减速控制的各种情况，证明其可以有效的提高系统的柔性，减小冲击，最后通过综合实验的对比，证明了该方法是一种具有良好综合性能的柔性加减速控制方法。最后一章总结全文的研究工作，并对今后CNC数控系统的发展进行了展望。更多还原

【Abstract】 Numerical control (NC) is the core of modern manufacturing, and the key technology of manufacturing automation ,and one of the most important aspects of industrial automation .Having great influence to machining quality, Acceleration/deceleration control is one of the key technologies in NC. With the background of "High-speed Micro-fragment NC machining system ", this thesis studied Acceleration/deceleration control method systematically and deeply.This paper is composed of six chapters. Chapter one introduced the development trend of NC technologies, and then illustrated the significance and classification of acceleration/deceleration control, the purpose of flexible acceleration/deceleration control was introduced. In Chapter two . normal acceleration/deceleration control methods was illustrated and analysis was also given, then specified the five phased S-curve flexible acceleration/deceleration control, the basic principal and math model was showed in detail ,and the control method was given. Chapter three introduced the control method for high-speed machining in the five phased S-curve flexible acceleration/deceleration control. The control method was extended to adapt high-speed machining. Chapter four is about the software development and implementation of CNC system. The structure and real-time mission design was built. And then the data process of the software system was explained. Chapter five is about the integration of the software system. Then proved the five phased S-curve flexible acceleration/deceleration control method could increase the flexibility of the system, and impact could be reduced with simulation results. At last, the said control method was compared with liner acceleration/deceleration and Curve acceleration/deceleration control method in comprehensive experiment, which showed that the five phased S-curve flexible acceleration/deceleration control method has a good combination property in speed control. Chapter six, also the last chapter, summarizes the study progress in whole paper and expecting the development of NC system later.更多还原